mirror of https://gitee.com/openkylin/openmpi.git
100 lines
2.7 KiB
Plaintext
100 lines
2.7 KiB
Plaintext
.\" -*- nroff -*-
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.\" Copyright 2010 Cisco Systems, Inc. All rights reserved.
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.\" Copyright 2006-2008 Sun Microsystems, Inc.
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.\" Copyright (c) 1996 Thinking Machines Corporation
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.\" $COPYRIGHT$
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.TH MPI_Add_error_class 3 "#OMPI_DATE#" "#PACKAGE_VERSION#" "#PACKAGE_NAME#"
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.SH NAME
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.nf
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\fBMPI_Add_error_class\fP \- Creates a new error class and returns its value
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.fi
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.SH SYNTAX
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.ft R
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.SH C Syntax
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.nf
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#include <mpi.h>
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int MPI_Add_error_class(int *\fIerrorclass\fP)
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.fi
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.SH Fortran Syntax
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.nf
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USE MPI
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! or the older form: INCLUDE 'mpif.h'
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MPI_ADD_ERROR_CLASS(\fIERRORCLASS, IERROR\fP)
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INTEGER \fIERRORCLASS, IERROR\fP
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.fi
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.SH Fortran 2008 Syntax
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.nf
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USE mpi_f08
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MPI_Add_error_class(\fIerrorclass\fP, \fIierror\fP)
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INTEGER, INTENT(OUT) :: \fIerrorclass\fP
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INTEGER, OPTIONAL, INTENT(OUT) :: \fIierror\fP
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.fi
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.SH C++ Syntax
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.nf
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#include <mpi.h>
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int MPI::Add_error_class()
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.fi
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.SH OUTPUT PARAMETERS
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.ft R
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.TP 1.4i
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errorclass
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New error class (integer).
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.ft R
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.TP 1.4i
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IERROR
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Fortran only: Error status (integer).
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.SH DESCRIPTION
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.ft R
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The function MPI_Add_error_class creates a new, local error
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class.
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.SH NOTES
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.ft R
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Because this function is local, the same value of \fIerrorclass\fP may
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not be returned on all processes that make this call, even if they
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call the function concurrently. Thus, same error on different
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processes may not cause the same value of \fIerrorclass\fP to be
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returned. To reduce the potential for confusion, MPI_Add_error_string
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may be used on multiple processes to associate the same error string
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with the newly created \fIerrorclass\fP. Even though \fIerrorclass\fP
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may not be consistent across processes, using MPI_Add_error_string
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will ensure the error string associated with it will be the same
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everywhere.
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.sp
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No function is provided to free error classes, as it is not expected
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that an application will create them in significant numbers.
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.sp
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The value returned is always greater than or equal to MPI_ERR_LASTCODE.
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.SH ERRORS
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.ft R
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Almost all MPI routines return an error value; C routines as
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the value of the function and Fortran routines in the last argument. C++
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functions do not return errors. If the default error handler is set to
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MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism
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will be used to throw an MPI::Exception object.
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.sp
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Before the error value is returned, the current MPI error handler is
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called. By default, this error handler aborts the MPI job, except for
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I/O function errors. The error handler may be changed with
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MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN
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may be used to cause error values to be returned. Note that MPI does not
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guarantee that an MPI program can continue past an error.
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.SH SEE ALSO
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.ft R
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.nf
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MPI_Add_error_code
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MPI_Add_error_string
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MPI_Error_class
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MPI_Error_string
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